Answer:
A. 65 degrees
Explanation:
The formula to calculate the range of a projectile is:
where
u is the initial speed of the projectile
g is the acceleration of gravity
is the angle of projection of the projectile
We want to find the angle such that it has the same range of a projectile fired at , therefore:
It follows that
And there are two angles that satisfies this condition:
and
In fact, with the second choice,
In milimetres:54000
or 54 metres
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